E
======================================================================
ERROR: setUpClass (tests.example_test.Tests)
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Traceback (most recent call last):
  File "/Users/user/Desktop/Qa/homework-4/tests/example_test.py", line 28, in setUpClass
    desired_capabilities=getattr(DesiredCapabilities, browser).copy()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 156, in __init__
    self.start_session(capabilities, browser_profile)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 245, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 314, in execute
    self.error_handler.check_response(response)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: Timed out waiting for driver server to start.
Build info: version: '3.12.0', revision: '7c6e0b3', time: '2018-05-08T15:15:08.936Z'
System info: host: 'users-MacBook-Air.local', ip: 'fe80:0:0:0:145f:133a:ba4b:11a5%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12.6', java.version: '1.8.0_131'
Driver info: driver.version: unknown
Stacktrace:
    at org.openqa.selenium.remote.service.DriverService.waitUntilAvailable (DriverService.java:192)
    at org.openqa.selenium.remote.service.DriverService.start (DriverService.java:178)
    at org.openqa.selenium.remote.server.ServicedSession$Factory.apply (ServicedSession.java:153)
    at org.openqa.selenium.remote.server.ActiveSessionFactory.lambda$apply$12 (ActiveSessionFactory.java:176)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.ReferencePipeline$11$1.accept (ReferencePipeline.java:373)
    at java.util.stream.ReferencePipeline$2$1.accept (ReferencePipeline.java:175)
    at java.util.Spliterators$ArraySpliterator.tryAdvance (Spliterators.java:958)
    at java.util.stream.ReferencePipeline.forEachWithCancel (ReferencePipeline.java:126)
    at java.util.stream.AbstractPipeline.copyIntoWithCancel (AbstractPipeline.java:498)
    at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:485)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto (AbstractPipeline.java:471)
    at java.util.stream.FindOps$FindOp.evaluateSequential (FindOps.java:152)
    at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.findFirst (ReferencePipeline.java:464)
    at org.openqa.selenium.remote.server.ActiveSessionFactory.apply (ActiveSessionFactory.java:179)
    at org.openqa.selenium.remote.server.NewSessionPipeline.lambda$null$2 (NewSessionPipeline.java:65)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.ReferencePipeline$2$1.accept (ReferencePipeline.java:175)
    at java.util.Collections$2.tryAdvance (Collections.java:4717)
    at java.util.stream.ReferencePipeline.forEachWithCancel (ReferencePipeline.java:126)
    at java.util.stream.AbstractPipeline.copyIntoWithCancel (AbstractPipeline.java:498)
    at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:485)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto (AbstractPipeline.java:471)
    at java.util.stream.FindOps$FindOp.evaluateSequential (FindOps.java:152)
    at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.findFirst (ReferencePipeline.java:464)
    at org.openqa.selenium.remote.server.NewSessionPipeline.lambda$createNewSession$3 (NewSessionPipeline.java:68)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.DistinctOps$1$2.accept (DistinctOps.java:175)
    at java.util.stream.ReferencePipeline$2$1.accept (ReferencePipeline.java:175)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
    at java.util.stream.ReferencePipeline$2$1.accept (ReferencePipeline.java:175)
    at java.util.stream.Streams$StreamBuilderImpl.tryAdvance (Streams.java:405)
    at java.util.stream.Streams$ConcatSpliterator.tryAdvance (Streams.java:728)
    at java.util.stream.ReferencePipeline.forEachWithCancel (ReferencePipeline.java:126)
    at java.util.stream.AbstractPipeline.copyIntoWithCancel (AbstractPipeline.java:498)
    at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:485)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto (AbstractPipeline.java:471)
    at java.util.stream.FindOps$FindOp.evaluateSequential (FindOps.java:152)
    at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.findFirst (ReferencePipeline.java:464)
    at org.openqa.selenium.remote.server.NewSessionPipeline.createNewSession (NewSessionPipeline.java:71)
    at org.openqa.selenium.remote.server.commandhandler.BeginSession.execute (BeginSession.java:65)
    at org.openqa.selenium.remote.server.WebDriverServlet.lambda$handle$1 (WebDriverServlet.java:246)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:617)
    at java.lang.Thread.run (Thread.java:748)

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Ran 0 tests in 20.374s

FAILED (errors=1)